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Subject: Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation
To: Gerd Hoffmann <kraxel@redhat.com>,
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From: Kirti Wankhede <kwankhede@nvidia.com>
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Date: Fri, 14 Jul 2017 15:45:53 +0530
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On 7/14/2017 3:31 PM, Gerd Hoffmann wrote:
>   Hi,
> 
>> In case when VFIO region is used to provide surface to QEMU, plane_id
>> would be region index,
> 
> Then we should name it "region_index" not "plane_id".
> 
>> for example region 10 could be used for primary
>> surface and region 11 could be used for cursor surface. So in that
>> case,
>> mdev vendor driver should return plane_type and its corresponding
>> plane_id.
> 
> Hmm?  plane_type is the input (userspace -> kernel) parameter.
> 

Yes, that's right. Sorry for confusion. And mdev vendor driver would
return which region to read.

Thanks,
Kirti

> cheers,
>   Gerd
>